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2 years ago

8. Skin cancer is a disease that occurs when skin cells grow in an uncontrolled way. It can be caused by UV

Chemistry

1 answer:

Levart [38]2 years ago

3 0

Answer:

Explanation:

I think none of the above, because when caused by a UV light it damages the cells. And if enough builds up overtime it causes uncontrollable growth and leads to skin cancer.

Hope that helped? It might be another answer honestly.

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During the daytime, wind blows off of the __________________ because that material takes ___________ time to get warm, creating

Butoxors [25]

Answer: sea, more

I hope this helps

5 0

2 years ago

Why Are Bees Important To The Environment/Ecosystem

GaryK [48]

Answer:

They are pollinators of alfalfa.

Explanation:

Without them crops wouldn't be here.

7 0

2 years ago

An analytical chemist weighs out 0.188 g of an unknown triprotic acid into a 250 mL volumetric flask and dilutes to the mark wit

Anon25 [30]

Answer: The molar mass of unknown triprotic acid is 97.66 g/mol

Explanation:

To calculate the molarity of acid, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of triprotic acid

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is NaOH.

We are given:

$n_1=3\\M_1=?M\\V_1=250mL\\n_2=1\\M_2=0.0600M\\V_2=95.9mL$

Putting values in above equation, we get:

$3\times M_1\times 250=1\times 0.0600\times 95.9\\\\M_1=0.0077M$

To calculate the molecular mass of solute, we use the equation used to calculate the molarity of solution:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}$

We are given:

Molarity of solution = 0.0077 M

Given mass of triprotic acid = 0.188 g

Volume of solution = 250 mL

Putting values in above equation, we get:

$0.0077M=\frac{0.188\times 1000}{\text{Molar mass of triprotic acid}\times 250}\\\\\text{Molar mass of triprotic acid}=97.66g/mol$

Hence, the molar mass of unknown triprotic acid is 97.66 g/mol

7 0

2 years ago

Please help... I am begging...

iVinArrow [24]

Answer:

The number, such as 98.7 FM, of a radio station represents:

the frequency in which is transmitted the radio signal.

Explanation:

The radio FM is the modulated frequency, which means that all the information is sent by just a signal, with different frequencies which difference them, the radio FM use the frequencies from 88 MHz until 108 Mhz (MHz is a measuring unit for the frequency), with a minimal space among them of 0.2 MHz, this last means that you could find a signal in 88.0 MHz, and the next should be 88.2 MHz, next 88.4 MHz and so (at least, regularly the space between two frequencies is more than 0.2 MHz).

5 0

2 years ago

What is the volume of 120 mg of water? A. 1.2 dL B. 120 mL C. 120 L D. 1.2 L

mojhsa [17]

I would say B but I am not sure so sorry if it is wrong!!

3 0

2 years ago